Transmission & Drivetrain
Availability
Building awesome horsepower is only part of the story. You need to deliver all that power to your car or truck’s wheels! We’ve got torque-hungry high performance automatic...
Building awesome horsepower is only part of the story. You need to deliver all that power to your car or truck’s wheels! We’ve got torque-hungry high performance automatic and manual transmissions for street and strip applications, torque converters and clutch sets, flexplates and flywheels, plus limited-slip differentials, spools, lockers, ring and pinion sets, driveshafts, U-joints, axles, bearings, C-clip eliminator kits, transfer cases, shift kits, and rebuild kits. We also have a wide selection of trans-brakes, shifters, cables, and accessories—everything you need to put the power to the ground, Summit style.
Building awesome horsepower is only part of the story. You need to deliver all that power to your car or truck’s wheels! We’ve got torque-hungry high performance automatic and manual transmissions for street and strip applications, torque converters and clutch sets, flexplates and flywheels, plus limited-slip differentials, spools, lockers, ring and pinion sets, driveshafts, U-joints, axles, bearings, C-clip eliminator kits, transfer cases, shift kits, and rebuild kits. We also have a wide selection of trans-brakes, shifters, cables, and accessories—everything you need to put the power to the ground, Summit style.
Half Scale Dragster Tru-Spin rear axle assemblies are built of one-piece billet aluminum, and include an integral sprocket hub and rotor hub mount, splined wheel hubs, and 70/75 T-6 splined aluminum rear axle (rear wheels and sprocket sold separately). The Tru-Spin assembly is set apart from a keyed rear axle because the sprocket hub and rotor hub are part of the axle—meaning the rear axle can never shift or slip. The ends of the axle are splined, allowing for a better distribution of power to the wheels, and a steel rotor is also included. This setup is recommended for anyone running in the 7.90 range.
Not Yet Reviewed
$696.99
Half Scale Dragsters 2-piece chain guards are designed for 2008 and later Half Scale Jr. Dragsters. Their 2-piece design is stronger and easier to adjust, and thus less prone to breakage. Half Scale Dragsters 2-piece chain guards are completely adjustable with the simple use of a Phillips screwdriver, making it quick and easy to fit them perfectly for your Jr. Dragster.
Not Yet Reviewed
$49.99
Half Scale Dragsters Polar Vortex clutch assemblies feature an efficiently designed clutch cover and ramp holder for a more consistent clutching experience. Their adjustable primary post allows for better belt clearance adjustment, improved clutch arms and Oilite bearings, and roller-to-ramp adjustment capabilities. Vortex clutches are available in standard ratio or overdrive. You have a choice of complete clutch assemblies or individual components. Get the most out of your Jr. Dragster with Polar Vortex clutch assemblies from Half Scale Dragsters.
Not Yet Reviewed
$303.99
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$999.99
Jr. Dragsters perform regular maintenance on their cars—and that includes replacing the various worn-out jackshaft components like supports, spacers, sensor tabs, and more. Half Scale Dragsters offers these parts in the appropriate shapes and sizes to match your specific needs, and experts recommend installing some new pieces often for top performance in every race. Stay ahead of the competition and order Half Scale Dragsters replacement jackshaft components before you need them!
Not Yet Reviewed
$11.99
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$189.99
Rear sprockets from Half Scale Dragsters offer a better spin on performance. These premium sprockets feature quality material in a 2-piece design that utilizes an interlock to ensure that everything lines up perfectly. And the two-tooth skip pattern makes them easier to turn by minimizing the rolling resistance. Get in motion with Half Scale Dragsters rear sprockets!
Not Yet Reviewed
$55.99
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$69.99
Half Scale Dragsters carry the Polar clutch replacement components you need for optimum shifting performance. From sheaves, sleeves, springs, and spacers, to bushings, buttons, and posts, Half Scale Dragsters deliver the parts to keep your Polar clutch consistent, smooth, and on track for the win!
Not Yet Reviewed
$7.99
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$606.99
Half Scale Dragsters offers their bearing cassettes as the housing that the axle bearing sits in and then mounts to the chassis itself. All chassis for this class should use the same size, with 3/8 in. bolts (not included) recommended to install them. Rely on Half Scale Dragsters bearing cassettes to help take your child through their entire junior racing career!
Not Yet Reviewed
$42.99
Get in motion with Half Scale Dragsters front sprockets. They are crafted from strong steel for #35 and #415 chain in a choice of tooth quantities. Drive your chain's performance with front sprockets from Half Scale Dragsters.
Not Yet Reviewed
$31.99
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$48.99
Half Scale Dragsters drive sprocket hubs are designed specifically for Juniors with keyed rear axles. With an inner diameter of 1 1/4 in., these sprocket hubs utilize standard 1/4 in. keys and Allen bolts. Rely on Half Scale Dragsters drive sprocket hubs to help take your child through their entire junior racing career!
Not Yet Reviewed
$35.99
Tune your Polar clutch with Half Scale Dragsters primary springs. They offer a selection of colors that will allow you to lower, raise, or keep the engagement of your clutch just as it was when it was new. Rely on primary springs from Half Scale Dragsters to help take your child through their entire junior racing career!
Not Yet Reviewed
$42.99
Z Automotive TranZformer electronic shift kits transform your car into a neck-snapping, tire-chirping fun to drive beast that at the press of a button, returns to stock. Best of all, they're completely hidden. Available in Gen 1 or Gen 2 kits, you can have your NAG1 transmission shift how YOU want it to. You get to modify shift firmness to fit your driving style/mood, plus a lot more. They install in minutes, connecting via wiretaps into wires hidden behind the steering column lower cover. Once installed, TranZformer kits will modify transmission parameters for that real "old school" muscle car shift feel. Chirp through gear shifts or just firm them up a little for towing or for track use; use your steering wheel buttons and EVIC screen (or cruise stalk/buttons for those without EVIC) to adjust shift firmness on-the-fly, whenever you want; connect to your PC via USB cable to dial-in independent upshift and downshift boost percentages (0 to 100) for each gear in both Drive and AutoStick mode. You can reduce the time delay when shifting into Reverse and Drive, adjust shift firmness scaling based on throttle position, and reset or kill the TCM's adaptive learning system, keeping the TCM from dialing back the shift firmness over time. Select the kit designed for your vehicle. Some of the features and benefits (may vary by kit): * Z Automotive Programming Utility (for Windows PCs only) allows you to program shift parameters, view status, update the firmware, and more * Steering wheel shifting (SWS) allows you to use your steering wheel's buttons to manually control gear shift while keeping your hands on the wheel * AutoUpshift allows you to set your own shift points when in AutoStick * Line Lock mode holds the vehicle with the front brakes so you can hit the gas and do a perfect burnout Peak rpm display: Will display actual shift rpms after each shift--great when adjusting auto upshift to squeeze every last bit out of that high revving cam, or to check what rpm you hit when shifting manually * 0 to 30 and 0 to 60 timer Reset adaptives: Will reset TCM adaptives any time you wish
Not Yet Reviewed
$259.00
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$289.00
Nothing is tougher on a torque converter than putting it behind a blown fuel engine. Made for supercharged engines, ATI Fuel & Blown torque converters are designed for the ultimate in high-horsepower holding for big cubic inch nitrous or supercharged engines. They feature a special 22-element sprag with double-cage construction to simultaneously control each sprag element. The sprag sits in concentric races that are heat-treated to 65 on the Rockwell C scale. A specification sheet must be filled out prior to ordering. Please call us at 1-800-230-3030 for further information.
Not Yet Reviewed
$1,263.99
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$1,499.00
Not all carbon fiber driveshafts are the same. QA1 has engineered their REV Series to be the ultimate in driveshaft technology. Unlike other carbon fiber models, QA1 REV performance driveshafts are designed and manufactured using the latest filament-winding equipment. They are specially wound with an exclusive 3M Matrix Resin that utilizes spherical nano scale silica, providing improved abrasion resistance and longevity, higher compressive strength, and minimal water absorption. They are fitted with precision CNC-machined forged yokes specially developed for QA1's 11-step bonding procedure and high-strength U-joints. QA1 REV driveshafts will deliver abundant performance with less weight, maximum strength, lower inertia, faster acceleration, increased longevity, and the ability to handle much more torque. They are designed, manufactured and balanced to the highest standards and are intended for use in maximum performance applications where increased safety and vehicle performance are primary considerations. As a result of converting from an isolated 2-piece driveshaft design, it may be possible for an increase in NVH (noise, vibration, harshness) to occur in certain operating conditions. Other notable features: * Conversion u-joints available * Harmonic-tested to ensure NVH requirements * Precision-balanced to ensure smooth, vibration-free operation * Torsion-tested and serialized
Not Yet Reviewed
$2,197.23
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$2,529.95
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